diff options
Diffstat (limited to 'src/mess/drivers/a7800.c')
-rw-r--r-- | src/mess/drivers/a7800.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/src/mess/drivers/a7800.c b/src/mess/drivers/a7800.c index cffcd9c747b..4602c3ce941 100644 --- a/src/mess/drivers/a7800.c +++ b/src/mess/drivers/a7800.c @@ -286,11 +286,11 @@ static ADDRESS_MAP_START( a7800_mem, AS_PROGRAM, 8, a7800_state ) AM_RANGE(0x0480, 0x04ff) AM_RAM AM_SHARE("riot_ram") AM_MIRROR(0x100) AM_RANGE(0x1800, 0x1fff) AM_RAM AM_SHARE("6116_1") AM_RANGE(0x2000, 0x27ff) AM_RAM AM_SHARE("6116_2") AM_MIRROR(0x0800) - // According to the official Software Guide, the RAM at 0x2000 is - // repeatedly mirrored up to 0x3fff, but this is evidently incorrect - // because the High Score Cartridge maps ROM at 0x3000-0x3fff - // Hardware tests show that only the mirror at 0x2800-0x2fff actually - // exists, and only on some hardware (MARIA? motherboard?) revisions + // According to the official Software Guide, the RAM at 0x2000 is + // repeatedly mirrored up to 0x3fff, but this is evidently incorrect + // because the High Score Cartridge maps ROM at 0x3000-0x3fff + // Hardware tests show that only the mirror at 0x2800-0x2fff actually + // exists, and only on some hardware (MARIA? motherboard?) revisions AM_RANGE(0x4000, 0xffff) AM_DEVWRITE("cartslot", a78_cart_slot_device, write_40xx) AM_RANGE(0x4000, 0xbfff) AM_DEVREAD("cartslot", a78_cart_slot_device, read_40xx) AM_RANGE(0xc000, 0xffff) AM_READ(bios_or_cart_r) // here also the BIOS can be accessed |